Improvement in machines foe mortising fence-posts aid sharpening fengs-rails



@einen tant attnt titte JOHN A. SNYDER, 0F GEORGETOWN, PENNSYLVANIA."

Lean-s Patent No. 73,844, @zaad Jamey 2s, isos.

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M TO ALL WHOM IT MAY CONCERN:

Be it known that I, JOHN A. SNYDER, of Georgetown, county of Northumberland, and State of Pennsyl Vania, have invented a new and useful Improvement in Machines for Sawing and Mortising Fcncedtails and Posts; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing, making a' part of this specification, in whichi p I`igure 1 is a plan ,or top view of my improved post-and-rail-fence machine.

Figure 2 is a side elevation of the same.

Similar letters of reference denote corresponding partsin both figures.

My invention consists in a novel arrangement of adjustable carriages and guide-ways in co nnection with a circular saw, and with boring and mortising-devices, for the purpose of conveniently sawing or pointing fencerails, and boring and mortising the posts to be used therewith, as will be hereinafter explained.

In the accompanying drawings, A represents an upright frame or table, ot'any suitable construction and height to adapt it to the purpose hereinafter set forth, and provived with suitable bearings a, in which is mounted a driving-shaft, to which motion is imparted in any usual or desired manner. B is a ground-extension of the frame A, consisting of two longitudinal bars or ways, hinged or otherwise connected at one'end to-said frame, and united at their outer ends bythe transverse bar or tie ,{and C is a vertical`frarne or carriage, of' about the same height as frame A, providedwith friction-rollers or wheels, arranged to rest upon and to move back and forth upon the longitudinal bars or ways of the frame-extension B. Ois a horizontal arm, attached to the reciprocating frame C, and arranged to work in a guiding-mortise or way in `frame A, aud which serves to steady frame() in its movements, and to maintain it in proper working relation to frame A. Additionalv steadying-arms maybe used, if found desirable. The top bar of frame C is slottedin the direction of its'length, the slot (marked el) being curved in the are of a circle, centring in the saw-table, hereinafter referred to, and has secured to it, for convenience in construction, a divided plate, e2, the two parts of which slightly overlap the mortise, and conform, on their adjacent faces or edges, to the curvature ofthe mortise, as shown in g. 1.

'Dis an adjustable ybar or plate, provided on its under surface witha curved rib, which also conforms in shape to the curvature of the mortise C', and to which is secured a metall plate, d, arranged to overlap the rib, and to work underneath the opposing parts of the divided plate c2, or a curved metal rail ofT-form, in cross-section, may be secured in an inverted position to bar D, if preferred. Dl is van upright swivelled in bar D, in such manner as to turnfreely therein, and provided, at a convenient point iu its height, with an adjustable clamp,

. cZ, for holding the rail while subjected to the action of the saw for pointing, as hereinafter set forth. E is a saw-carriage 'or frame, hinged at e to the frame A, and provided with suitable bearings,'in which is mounted the shaftf, which is armed with circular saw F and driving-pulleyf, to which motion is imparted by means of an endless belt from the main axleror shaft a.

Thesaw, when in operation, is raised into the position shown in black lines, iig. 2, working through aslot, g, in the saw-table G,i(see fig. 1,) and, when not in use, may, if desired, be removed from the table, and depressed into-position, shown by red lines, g. 2, when, by the approach ot' its shaft toward the main drivingshaft, the belt is slacked, and the saw ceases to rotate. When raised, the saw-frame is sustained in working `position by means of hooks e", or other equivalentdevice.

His a horizontal shaft, mounted i n suitable bearings z on frame A, and armed with a pulley I-I, to which motion is communicated from shaft a. The inner end of thel shaft H is provided with a hit-stock, adapted to receive bits for boring `the posts, as hereinafter explained. I is a horizontal frame, mounted in longitudinal ways or rebates formed in the upper longitudinal bars of frame A, and upon one end of which the slotted saw table G is secured. One of the longitudinal bars of frame I is provided with a toothed rack on its under sur-. face, into which a spur-wheel on shaft il gears, and/by means of which a longitudinal reciprocating movement is impa1'tcd,'whcn desired, by means of crank or crank-wheel t?, (see iig. 2.) z'z'are transverse bars of frame I, which are rebatcd, or provided with plates overlapping their `adjacent faces, to afford way/s for a second horizontal and transverselyladjustablc frame, K, the outer/bars ofiwhieh are groovcd (wat or otherwise adapted to Work back and forth on ways or guides i. K is a table, mounted on the frame The bars K oi` said frame, either one or both, are provided with toothed racks L, which mesh `into and are reciproeated by means of pinions on horizontal shaft L. The shaft Ii is provided with an additional spur-wheel, by means of which it is rotated through a rack, M, toothed upon the bottom, and upon one of its sides, and operated 'by the horizontal pinion m on the vertical crank-shaft-m', mounted in any suitable manner on frame or carriage N are uprights, mounted in the reciprocating frame K, and provided with clamps or clamping-devices forholding the posts while subjected to the action ofthe bit. Y

By this construction, it will he seenl that the frame K is rendered adjustable in paths at right angles' to each other,.as follows, viz, transversely of frame A, and ot' the carriage or frame I, by means of the transversely reciprocating carriage K, operated byeranls-shaft m and theconnecting mechanism described, or its equivalent, and longitudinally of frame A with frame orearriage I, by'means of shaft i', in the manner described. In thisY nay the posts'(one of which is represented at O inthe drawing) are rmly held by clamps on the upright or carriage K while being presented to the bit, and adjusted back and forth into `proper position for boring for the several mortises therein.

P is a mortising-chisel, mounted in a vertically-reciprocating carriage, P', which is arranged to work up and down on suitable ways in the framing Q, attached to one corner of frame .iL-and which is operated by means of a cam-lever, R, pivoted at r in the frame Q, (see fig. 2.) The chisel P is made in size and form to correspond with the mortise to be eut' in the posts, in such manner that the mortise, after the posts have been properly bored, is completed by a single stroke of the chisel. If preferred, however, thecrdinary mortisingf chisel may be used. i i I i The pointing of the rails is effected as follows: The said rail (which is -represented in the drawings at D?) is securedr'at or near its centre, in the clamp d n the swivelling-post Dl, when, by the longitudinal adjust-ment of said bar in its curved track, and the swivelling of the post mounted therein, the rail is brought into the desired angle of relation to the circular saw, and the forward movement of carriage Clpresents the rail to the saw, and it is-cut as desired. The point having been thus cut upon one end of the rail, is turned end for endwithout the necessity of being removed from the holding-clamp, by means of the s'wivelling-standard, and the other end is pointed orcurved in the same manner. The operation of the other parts has been described in connection with the description of their construction, andneed not be further referred to here.'

It will be apparent that changes may be made in the construction of-some of the parts ofthe machine, as

in the holding-clamps, and the particular arrangement of the means for operating the reciprocating carriage, 'without departing from my invention. Y

Having now describedthe construction and operation of my improved machine for pointing and inortising fence-rails and posts, what I claim, and desire to secure by Letters Patent, isfl I A 1. The rail-carriage, consisting of the adjustable bar D, mounted on the upright reciprocating carriage C, and provided with the swivelling-clamp standard D, the whole lconstructed-and operating in the manner and for the purpose set forth. l I I 2. The reciprocating rail-carriages I'and K, adapted to be moved in paths at right angles to each other, in combination with the toothed racks and pinions for operating said carriages, the whole arranged and operating as described.

JOHN SNYDER.

Witnesses: A

J. FRANK MILLER, .Licor GMM. 

